Question

В классе несколько ребят собирали интересные марки. 15 человек собирали марки России, 11 человек – иностранные марки, из них 6 человек собирали и марки России, и иностранные марки. Сколько всего ребят в классе собирали марки?

Answer 1

11+15=26(ч.)
Ответ: марки собирали 26 человек.

Answer 2

Calculation of the Total Number of Students Collecting Stamps

To determine the total number of students in the class who collected stamps, we need to analyze the given information.

- 15 students collected stamps from Russia. - 11 students collected stamps from foreign countries. - 6 students collected stamps from both Russia and foreign countries.

To find the total number of students who collected stamps, we can add the number of students who collected stamps from Russia and the number of students who collected stamps from foreign countries, and then subtract the number of students who collected stamps from both Russia and foreign countries.

Let's calculate it step by step:

1. Number of students collecting stamps from Russia: 15. 2. Number of students collecting stamps from foreign countries: 11. 3. Number of students collecting stamps from both Russia and foreign countries: 6.

Now, let's calculate the total number of students who collected stamps:

- Total number of students collecting stamps from Russia and foreign countries: 15 + 11 = 26. - Number of students who collected stamps from both Russia and foreign countries: 6.

To find the total number of students who collected stamps, we subtract the number of students who collected stamps from both Russia and foreign countries from the total number of students collecting stamps from Russia and foreign countries:

26 - 6 = 20.

Therefore, there were a total of 20 students in the class who collected stamps.

Please let me know if there's anything else I can help you with!